Heater.



No. 684,027. j YPatented Oct. 8, |90I.

. F. D. WOODRUFF.

HEATER.

(Applica'ton led Jan. 16, 1901.) (No Model.) l2 sheefwsh'eet l.

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(No Model.)

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(Application led Jan. 16, 1901.)

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NITED STATES PATENT OFFICE;

FREDERICK D. WOODRUFF, OF MAYVOOD, ILLINOIS.

HEATER.

SPECIFICATION forming part of Letters Patent N o. 684,027, dated October8, 1901.

Application tiled January 16, 1901. Serial No. 43,486. (No model.) A ABe it known that I, FREDERICK D. WOOD- RUFF, a citizen of the UnitedStates, residing at Maywood, in the county of Cook and State ofIllinois, have invented a certain new and useful Improvementin/IIeaters, (Case No. 2,) of which the following is a full, clear,concise,

'and exact description.

My invention relates to a heater; and my object is to provide a heaterof new and attractive design which may be placed directly in the room tobe warmed and from which a maximum amount of heat will be obtained Vfroma given consumption of fuel.

I will describe my invention in connection with the accompanyingdrawings, which illustrate the preferred embodiment thereof, and

-the features which I regard as new will be pointed out in the appendedclaims.

Figure l is a front elevation of the heater. Fig. 2 is a plan viewthereof. Fig. 3 is a transverse Vertical sectional elevation on line 3 3of Fig. 1, and Fig. 4 is a sectional elevation taken on line 4 4 of Fig.2.

The same letters of reference are used to` designate the same partswherever they are shown.

One of my objects has been to produce a heating-stove which would havethe combined advantages of an ordinary stove and an open- -grate fire,and I have therefore constructed the tire-pot a in the form of an opengrate, as shown most clearly in Figs. l and 3. The

general shape of this repot is rectangular, like a box, with the frontopen. The fire-grate cd, upon which theifuel is to vbe burned, is set inthe tire-pot a distance above the iioor thereof, leaving an ash-pitunderneath. A deflector-plate a2 is placed diagonally in the fire-pot,as shown most clearly in Fig. 3, said deflector-plate extending from therear wall of the fire-pot a few inches above the grate a outward andupward, slanting toward the open front of the lire-pot and terminating afew inches below the roof of the fire-pot to leave an open passagebetween the plate and the roof, through which the products of combustionmay pass.

The body portion of the stove is in the form of a double-walled drum b,between the inner and outer walls whereof the products of combustion areled in spiral lues, which I shall presently describe. An oblong opencourt is left in the center of the drum, through which air may rise andreceive the heat from the drum. This court communicates` with theoutside of the stove at the bottom through the perforated base-plate cand. at the top through the grating CZ. The fire-pot projects somedistance linto this court, so that the` air rising through the court isheated bythe rear wall of the fire-pot, as well as by the heated gli.

products of combustion passing through the drum. Spiral partitions e care provided betweenithe double walls of the drum b, formi ing linesthrough which the products of'combustion from the fire-pot are led.TheseY partitions are peculiarly arranged to take the greatest advantageof the heat giveno from the fire-pot. The flue leads from the right-handupper corner of the re-pot,. as

seen in Fig. l, and passes in a spiral downward course around the drumto the left-hand side of the tire-pot near the bottom. The partitionwhich forms the roof .of the flue at this point is cut away a littledistance from the side wallof the fire-pot, so that,in effect,a flue ismade which meeting the fire-pot nearv the lower edge rises verticallyalong the left-hand wall to the top and then passes back over itself` ina spiral course to the other side of the lire-pot in the front wall'ofthe stove. The flue continues ascending spirally between the doublewalls of the drum until it terminates in a connection leading tothechimney` f. In

.tire-pot and thence along over the roof of the this way it will be seenthat the heat radiated j g in the lower part of the flue a shortdistance after it leaves the fire-pot, which plate serves not only toretain the products of combustion for a longer time within the flue, butalso to catch and hold particles of soot and light solids which havebeen drawn into the flue without being entirely consumed. A door h isprovided in the lower part of the drum, through which the dust and sootmay be removed from time to time as maybe necessary.

The fuel which I prefer to use in my heater is coal, and I have provideda coal-chute leading from the top of the stove at the left in a diagonaldirection down to the fire-pot, opening into the fire-pot on a line withthe lower edge of the deector-plate a2. A hole is cut in thedeflector-plate, through which the mouth of the coal-'chute' projects.In the operation of the stove the chute may be filled with coal, whichwill automatically feed itself down upon the re as fast as the coal inthe grate is consumed.

For starting the fire I have provided a direct-draft flue i, leadingrfrom the rear edge of the roof of the fire-pot directly to the chimneyf.A damper 7c is provided in this flue, so that it may be closed after thefire is well under way.` The usual check-damperc' may `be provided inthe stovepipe.

To prevent the inflow of cold air over the `top of the fire, Ipreferably provide a mica front or screen l, which may beset in thegrate in the manner of a blower. This has all of the advantages of ablower, with the additional advantage that the light of the tire can beseen through it from the room and may be used or not, as desired.

In the operation of the stove the smoke and products of combustionrising from the grate are thrown forward by the defiector-plate CL2 andpassing through the narrow throat left near the roof of the fire-potenter the iiue, which is formed by the spiral partitions e e. The courseof the gases at first is downward around the back of the drum to theother side wall of the fire-pot near the bottom, thence up alongsidethis wall to the top, then running back to the other side, passing overthe top of the fire-pot and following a spiral course around the drum tothe chimney.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent, the following:

l. In a heating-stove, the combination with a double-walled drum havinga central open court, of a fire-pot or open grate ct set into the sideof the drum and extending into the open court, a flue being providedaround the drum between the walls thereof, whereby the products ofcombustion circulating in the drum are reheated by both sides and thetop of the fire-pot, and the air in the open court is heated by the rearwall of the fire-pot as well as by the drum, substantially as set forth.

2. In a heating-stove, the combination with a lire-pot a, of aheat-radiating flue connected with the fire-pot on one side, passingaround back of the fire-pot to the other side thereof, rising alongsidethe tire pot, then passing back over itself and continued spirallyupward, passing over the top of the tire-pot and finally terminating ina chimney connection, said flue forming an inclosed court o'rheating-drum with the fire-pot set in the side' thereof, substantiallyas described.

3. In a heating-stove, the combination with a tubular drum having acentral court open at the top and communicating with the air at thebottom, of a fireplace or open grate set into the side of the drum, saiddrum having an Opening or flue through which products of combustion passfrom the fireplace into the drum, and partitions in the drum forming aiiue leading spirally around the drum and communicating with the chimneyconnection at the top, substantially as described.

It. In a heating-stove, the combination with the fire-pot or grate, of aiiue leading from the side of said fire-pot in a downward path aroundthe back of the fire-pot to the opposite side thereof, and thence in areversed spiral path upward to the chimney connection fortning a centralcourt, the said court communieating with the air at the top and bottom,whereby air entering at the bottom of the court is heated by the spiralflue and passes out at the top to warm the room, as described.

5. In a heating-stove, the combination with a fire-pot consisting of afireplace or open grate, of a heat-radiating flue connected with thefire-pot on one side, passing around back of the fire-pot and ascendingspirally t0 a chimney connection, the said flue forming a central courtcommunicating with the air at the top and bottom, the fire-pot being setinto the side of the central court so formed, substantially as setforth.

In witness whereof I hereunto subscribe my name this 14th day ofJanuary, A. D. 1901.

FREDERICK D. WOODRUFF.

Vitnesses:

DE WITT C. lTANNER, W. W. LEACH.

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